IOsub
IOsub is a conceptual framework used in computer science to model and analyze input/output subsystems within computing systems. It provides a structured way to examine how devices, buses, and data pathways interact and how software policies govern access to I/O resources. IOsub emphasizes the separation of concerns among hardware interfaces, data transport, buffering, and coordination logic, enabling systematic comparison of different I/O designs.
A typical IOsub architecture consists of several layers: an I/O interface layer that wraps device drivers and
In practice, IOsub supports multiple I/O models, including blocking and non-blocking I/O, synchronous and asynchronous operation,
IOsub is not a standard or product but a pedagogical construct found in textbooks and research papers.